llvm/llvm/include/llvm/IR/Verifier.h

//===- Verifier.h - LLVM IR Verifier ----------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines the function verifier interface, that can be used for
// validation checking of input to the system, and for checking that
// transformations haven't done something bad.
//
// Note that this does not provide full 'java style' security and verifications,
// instead it just tries to ensure that code is well formed.
//
// To see what specifically is checked, look at the top of Verifier.cpp
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_IR_VERIFIER_H
#define LLVM_IR_VERIFIER_H

#include "llvm/ADT/DenseMap.h"
#include "llvm/IR/PassManager.h"
#include <utility>

namespace llvm {

class APInt;
class Function;
class FunctionPass;
class Instruction;
class MDNode;
class Module;
class raw_ostream;
struct VerifierSupport;

/// Verify that the TBAA Metadatas are valid.
class TBAAVerifier { … };

/// Check a function for errors, useful for use when debugging a
/// pass.
///
/// If there are no errors, the function returns false. If an error is found,
/// a message describing the error is written to OS (if non-null) and true is
/// returned.
bool verifyFunction(const Function &F, raw_ostream *OS = nullptr);

/// Check a module for errors.
///
/// If there are no errors, the function returns false. If an error is
/// found, a message describing the error is written to OS (if
/// non-null) and true is returned.
///
/// \return true if the module is broken. If BrokenDebugInfo is
/// supplied, DebugInfo verification failures won't be considered as
/// error and instead *BrokenDebugInfo will be set to true. Debug
/// info errors can be "recovered" from by stripping the debug info.
bool verifyModule(const Module &M, raw_ostream *OS = nullptr,
                  bool *BrokenDebugInfo = nullptr);

FunctionPass *createVerifierPass(bool FatalErrors = true);

/// Check a module for errors, and report separate error states for IR
/// and debug info errors.
class VerifierAnalysis : public AnalysisInfoMixin<VerifierAnalysis> { … };

/// Create a verifier pass.
///
/// Check a module or function for validity. This is essentially a pass wrapped
/// around the above verifyFunction and verifyModule routines and
/// functionality. When the pass detects a verification error it is always
/// printed to stderr, and by default they are fatal. You can override that by
/// passing \c false to \p FatalErrors.
///
/// Note that this creates a pass suitable for the legacy pass manager. It has
/// nothing to do with \c VerifierPass.
class VerifierPass : public PassInfoMixin<VerifierPass> { … };

} // end namespace llvm

#endif // LLVM_IR_VERIFIER_H